I like the idea. A friendly banner that says "Did you know that your iPhone really doesn't need Antivirus apps? Learn more..." is a nice way to educate the user.
Nevertheless garbage apps like the one described here have no place in the App Store and should not be available at all.
In hindsight, this seems obvious, and a great idea. Are there any "banned search keywords" now, or is it completely unrestricted? I'm curious if there's just no mechanism for this at all, or if they just aren't using it when they should.
One could argue to the contrary; The existence (and apparent success) of scam apps like this is a clear evidence your iPhone could use a 3rd party "virus scanner" - one that would protect you from malicious "virus scanners" :p
No. The only way would be to check "openURL" for known ones, but that's limited. Or from some webserver update a list of known scam ones and just tell them to uninstall them.
The link is 6 years old and the direct link at the bottom mentions (like I) that that particular method is not viable anymore.
As for the 'check running apps'. Maybe that works still, but as mentioned it only works if the apps are running at the same time, or recently. So it would never give you a full list.
Nevertheless garbage apps like the one described here have no place in the App Store and should not be available at all.